Calkins, K. R. (1968). The election of Hugo Haase to the co-chairmanship of the SPD and the crisis of pre-war German social democracy. International review of social history. - Internationaal Instituut voor Sociale Geschiedenis, Amsterdam.
Chicago ZitierstilCalkins, Kenneth R. "The Election of Hugo Haase to the Co-chairmanship of the SPD and the Crisis of Pre-war German Social Democracy." International Review of Social History. - Internationaal Instituut Voor Sociale Geschiedenis, Amsterdam 1968.
MLA ZitierstilCalkins, Kenneth R. "The Election of Hugo Haase to the Co-chairmanship of the SPD and the Crisis of Pre-war German Social Democracy." International Review of Social History. - Internationaal Instituut Voor Sociale Geschiedenis, Amsterdam, 1968.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.
